9 Python GUI Libraries That Stand Out in 2026

Traditional Desktop Application Libraries

1. Tkinter – Built‑in GUI toolkit

Tkinter is part of the Python standard library, requires no extra installation, and provides basic widgets such as windows, buttons, and entry fields, making it ideal for quick small‑tool prototypes.

import tkinter as tk

def say_hello():
    greeting_label.config(text="Hello, " + name_entry.get())

root = tk.Tk()
root.title("Tkinter Example")
root.geometry("300x150")

name_label = tk.Label(root, text="Enter your name:")
name_entry = tk.Entry(root)
greeting_label = tk.Label(root, text="")
confirm_button = tk.Button(root, text="Say Hello", command=say_hello)

name_label.pack(pady=5)
name_entry.pack(pady=5)
confirm_button.pack(pady=5)

greeting_label.pack(pady=5)

root.mainloop()

2. Kivy – Cross‑platform multi‑touch library

Kivy is an open‑source library designed for applications that run on multiple platforms, including mobile devices, and supports multi‑touch input via its KV language.

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button

class KivyApp(App):
    def build(self):
        layout = BoxLayout(orientation='vertical', padding=20, spacing=10)

        self.name_input = TextInput(hint_text='Enter your name', size_hint=(1, 0.2))
        self.greeting_label = Label(text='Greeting will appear here', size_hint=(1, 0.2))
        confirm_button = Button(text='Say Hello', size_hint=(1, 0.2))
        confirm_button.bind(on_press=self.say_hello)

        layout.add_widget(self.name_input)
        layout.add_widget(confirm_button)
        layout.add_widget(self.greeting_label)
        return layout

    def say_hello(self, instance):
        self.greeting_label.text = "Hello, " + self.name_input.text

if __name__ == '__main__':
    KivyApp().run()

Modern Web‑style Application Libraries

3. Flet – Flutter‑based modern UI

Flet brings Flutter's UI engine to Python, allowing developers to build beautiful web, desktop, and mobile apps without writing Dart. It supports hot‑reload and cross‑platform deployment.

Write UI in pure Python, no HTML/CSS/JS required

Runs on web, desktop, and mobile

Hot‑reload for rapid iteration

import flet as ft

def main(page: ft.Page):
    page.title = "Flet Example"
    page.vertical_alignment = ft.MainAxisAlignment.CENTER
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER

    name_field = ft.TextField(label="Your name", width=300, text_align=ft.TextAlign.LEFT)
    greeting_text = ft.Text()

    def button_clicked(e):
        greeting_text.value = f"Hello, {name_field.value}!"
        page.update()

    confirm_button = ft.ElevatedButton(text="Say Hello", on_click=button_clicked)

    page.add(name_field, confirm_button, greeting_text)

ft.app(target=main)

4. NiceGUI – Minimalist web interface

NiceGUI builds on FastAPI and Vue.js, letting developers create rich browser‑based interfaces with pure Python. It is well‑suited for dashboards, internal tools, and interactive prototypes.

Pure‑Python UI generation

Supports web, desktop, and mobile deployment

Real‑time hot updates

from nicegui import ui

def greet():
    greeting_label.set_text(f"Hello, {name_input.value}!")

name_input = ui.input(label='Enter your name')
confirm_button = ui.button('Say Hello', on_click=greet)

greeting_label = ui.label()

ui.run()

5. Eel – Bridge between Python and web technologies

Eel is a lightweight library that connects a Python backend with an HTML/CSS/JavaScript frontend, useful when you already have web development experience.

Leverages existing web stack

Two‑way communication between Python and JavaScript

Lightweight and easy to start

import eel

eel.init('web')

@eel.expose
def greet_user(name):
    return f"Hello, {name}!"

eel.start('index.html', size=(400, 300))

6. Reflex – Full‑stack Python solution

Reflex (formerly Pynecone) lets you write full‑stack web applications entirely in Python; it generates a React frontend and includes built‑in state management.

Complete full‑stack capability

Built‑in state management

React‑quality UI

import reflex as rx

class State(rx.State):
    name: str = ""
    counter: int = 0

    def set_name(self, name):
        self.name = name

    def increment_counter(self):
        self.counter += 1

def index():
    return rx.vstack(
        rx.input(placeholder="Enter your name", on_change=State.set_name, width="200px"),
        rx.button("Say Hello", on_click=lambda: State.set_name(State.name), width="200px"),
        rx.text(State.name),
        rx.divider(),
        rx.text(f"Counter: {State.counter}"),
        rx.button("Increment", on_click=State.increment_counter, width="200px"),
        spacing="1em",
        align="center",
        padding_top="10%"
    )

app = rx.App()
app.add_page(index)
app.compile()

7. PyWebView – Lightweight web view

PyWebView uses the system's native WebView component to display web content without bundling a full browser engine, making it ideal for wrapping existing web apps as desktop programs.

Ultra‑lightweight, low resource usage

Native window combined with web technology

Simple JavaScript‑Python bridge

import webview
import threading

def run_window():
    window = webview.create_window('PyWebView Example', 'web/index.html', width=400, height=300)
    webview.start()

if __name__ == '__main__':
    thread = threading.Thread(target=run_window)
    thread.start()

Terminal Text UI Libraries

8. Textual – Modern GUI in the terminal

Textual enables rich text‑based user interfaces inside a terminal, supporting CSS‑like styling, mouse interaction, and asynchronous programming.

Create rich terminal UIs

CSS styling and modern colors

Full mouse and keyboard support

from textual.app import App, ComposeResult
from textual.widgets import Header, Footer, Static, Container

class ClockApp(App):
    CSS = """
    Container {
        align: center middle;
        height: 100%;
    }
    #time_display {
        width: auto;
        height: auto;
        background: $panel;
        color: $text;
        padding: 1 2;
        border: tall $background;
    }
    #time_display:focus {
        border: tall $accent;
    }
    """

    def compose(self) -> ComposeResult:
        yield Header()
        yield Container(Static("00:00:00", id="time_display"))
        yield Footer()

    def on_ready(self):
        self.set_interval(1, self.update_time)

    def update_time(self):
        from datetime import datetime
        current_time = datetime.now().strftime("%H:%M:%S")
        self.query_one("#time_display", Static).update(current_time)

if __name__ == "__main__":
    ClockApp().run()

High‑Performance Professional Libraries

9. Dear PyGui – GPU‑accelerated professional GUI

Dear PyGui is a GPU‑accelerated library inspired by game engines, suited for data‑intensive visualizations, engineering tools, and real‑time dashboards.

GPU‑accelerated rendering for excellent performance

Designed for data‑visualization and high‑frequency refresh

Immediate‑mode interface similar to game engines

from dearpygui.core import *
from dearpygui.simple import *

def save_callback(sender, data):
    input_value = get_value("Input Text")
    log_debug(f"Input value saved as: {input_value}")

def button_callback(sender, data):
    input_value = get_value("Input Text")
    add_text("Result Text", f"You entered: {input_value}")

with window("Main Window"):
    add_text("This is a Dear PyGUI example")
    add_input_text("Input Text", label="Type something", default_value="Hello GUI")
    add_button("Show Input", callback=button_callback)
    add_same_line()
    add_button("Save", callback=save_callback)
    add_separator()
    add_text("Result Text", default_value="Your input will appear here")

start_dearpygui()

Library Selection Guidance

Choosing a library depends on specific requirements:

Beginners or quick small tools – start with Tkinter .

Mobile or touch‑enabled apps – choose Kivy .

Modern, cross‑platform UI – Flet provides a Flutter‑like experience.

Data‑intensive or high‑performance apps – Dear PyGui leverages GPU acceleration.

Rapid internal‑tool or dashboard creation – NiceGUI or Reflex .

Packaging existing web projects as desktop apps – Eel or PyWebView .

Enhancing command‑line tools – Textual .